Lubricator.



UNITED STATES PATENT OFFICE.

LUBRICATOR.

Specification of Letters Patent.

Eatented July 3, 1906.

Applicationfiled January 19, 1906. Serial No. 2963M.

T0 aZZ whom it may concern.-

Be it known that I, LEWIS GLEASON, a citizen of the United States,residing at Franklin, in the county of Venango and State ofPennsylvania, have invented new and useful Improvements in Lubricators,of which the following is a specification.

My invention relates to lubricators; and its object is to provide apressure-operated lubricator designed for any devices having a pulsativepressure-such as air-compressors, gas-engines, and steam-enginecylinders and particularly to provide means whereby a certain andpositive closing of the lubricatorcap against the valve-operatingpressure is insured.

To these ends my invention is embodied in preferable form in the devicehereinafter de scribed and illustrated in the accompanying drawings.

Referring to the drawings, Figure 1 is a central vertical section of thelubricator, and

Fig. 2 a detail section on line at w of Fig. 1.

In the drawings, 1 is the oil-containing cup of the lubricator, whichpreferably has its wall made of glass to permit inspection of thecontents of the cup. A cover 2 closes the upper end of this cup, andbetween this cover and the upper edge of the cup is placed a gasket 3,of rubber or cork, and a similar gasket 4 is placed between the bottomof the cup and the lubricator-base 5. The cover 2 has a centraldepending stem 6, provided with screwthreads 7, engaging a threaded stem8, rising from the base, whereby the cover, cup, and base are clampedtogether. 9 is made integral with the cover to provide means forengagement of a wrench to effect the removal of the cover. A looseremovable filling-plug 10 is placed in the cover. It has an air-vent 11to permit the entrance of air to the cup and to prevent any possibleaccumulation of pressure therein.

Extending through the stem 6 and threaded into the same at the upperpart thereof is a feed-regulating rod 12, having at its lower end aconical head 13, and a pin 14, which forms an oil-dropper. This head andthe pin fit in a correspondingly-shaped passage-way for oil, 15, formedin the base 5, and oil-inlet passage-ways 16 lead from the oil-cup 1 tothis central passageway 15. The rod 12 serves to check and control theoil to a dropby-drop feed from the cup and by its adjustment to regulatethe quantity of each drop.

Leading into the chamber formed by the A hexagon nut base 5 is anair-inlet opening 16 for the purpose of preventing a vacuum in saidchamber. Within the base portion 5 is avertical glass sight-feed tube,which is exposed to View by the circular sight-opening 17, cut out inthe wall of the base 5.

Beneath the oil-dropper 14 is a main valve 19, mounted so as to freelymove within the tube 17 and having the surface of its upper endcountersunk to form an oil-catching basin 20, with which communicates apassageway or passage-ways 2]., leading through the valve to the outeredge thereof, so as to con vey the oil to a longitudinal channel orchannels 22 on the exterior of the valve-stem. At its lower end thevalve-stem carries a head 23, adapted to seat when the valve is carriedupwardly against the conical upper face of chamber 24, formed in thelower part of the base portion 5, to the lower end of which chamber thevalve is adapted to drop in its oil-cut-off movement.

The valve 19 is made hollow and receives within the stem avertically-movable auxiliary valve 25, which is provided with alongitudinal slot 26, engaging a cross-pin 27 on the main valve, thuspermittin free vertical movement of the auxiliary va ve within the mainvalve.

Between the upper end of the valve 25 and the inner portion of the mainvalve is confined a coiled spring 28, which tends to separate the valvesand which aids in holding the main valve tightly in its seat when thevalve is forced upward and acts to quickly open the auxiliary valve whenthe pressure is removed. At its lower end the valve 25 is provided witha valve-head 29, adapted to seat in and close and open the upper end ofa chamber 30 in a standard or mounting base 31, which forms the meanswhereby the lubricator is secured to the cylinder or other pressuremember to be lubricated. The base 5 is secured to this standard by ascrew-threaded connection 32. The tubular guideway in which the stem ofthe valve 19 moves is channeled or widened sufficiently to permit of thepassage of oil through the same.

The operation of the device is as follows: The feed-regulator 12 beingset to the desired adjustment, oil will drop from the cup past thedropper and through the sight-feed tube on to the basin 20 of main valve19, and the oil will pass throu h said valve 19 into the channels 22into the chamber 24;. Upon a pressure impulse in the cylinder to whichthe lubricator is attached the auxiliary valve 25 of gravity, theatmospheric pressure obtained by the air-inlets preventing any vacuumabove the valves that would tend to check their descent. In the descentof the main valve 19 sufiicient oil will escape from the passage-ways 22past the head of the valve and into chamber 30 to provide the properintermittent supply of lubrication, and then when the said valve 19 isseated in its lower seat this supply will be out off. It is important invalves of this type that absolute security against the entrance of thepressure mediumwhether gas, steam, or air-to the oil-cup, theneck-connecting base and cup, or to the sight-feed be provided, and thissecurity is obtained by the two-valve arrangement of my invention. Theconnection between the valves not only permits an independent action ofthe auxiliary valve, but also by means of the interposed spring theopening and closing movements of the valves are greatly accelerated.

It is clear that various changes in the details of the device may bemade without departing from the principle of my invention.

Having thus described my invention, what I claim is 1. A lubricator foran intermittent-pressure device, having a main cut-ofi valve, anauxiliary valve movable independently of the main valve, said main valvemovable downward by gravity to cut off the oil-supply and said auxiliaryvalve movable upward by pressure, and means to close said main valveagainst said pressure by the said movement of the auxiliary valve,substantially as described.

2. A lubricator for an intermittent-pres sure device having an oil-cup,and a communicating passage-way between said cup and device, a hollowmain cut-ofi valve in said passage-way normally seated by gravity to cutoff the supply of oil to the device, anauxiliary valve seated withinsaid main valve, and operated by the pressure to cut off thecommunication with the device, said main valve being operated by saidauxiliary valve to close the passage-way against said pressure, and anaccelerating-spring confined between said valves, substantially asdescribed.

3. A lubricator for an intermittent-pressure device, having an oil-cup,and a passageway between said cup and device, said passage-way having anoil-chamber, a main cutofi valve in said passage-way, an auxiliary valvebelow the main valve having a movement independent thereof, said mainvalve having a valve-head extending into said chamber, there being seatsfor said valve at the upper and lower ends of said chamber, said mainvalve-head being movable by gravity to its lower seat to cut oil thesupply of oil, and movable by the pressure-operated auxiliary valve toits upper seat to cutoff the pressure, substantially as described.

4. A lubricator for an intermittent-pressure device having an oil-cup, amain cut-off valve movable by gravity to cut off the oilsupply andmovable by the pressure to cut off the pressure, said main valve havinga basin in its upper end to receive the oil from said oil-cup and havingpassage-ways leading from said basin, and an auxiliary valve looselyconnected to said main valve, substantially as described.

In testimony whereof I affix my signatur in presence of two subscribingwitnesses.

LEWIS GLEASON Witnesses:

GEO. MALONEY, ROBERT N. SrEER.

